Não informado. (1970). Pipeline and Gas Journal. Petroleum Engineer Publishing.
Cita Chicago Style (17a ed.)Não informado. Pipeline and Gas Journal. Dallas, Tex: Petroleum Engineer Publishing, 1970.
Cita MLA (8a ed.)Não informado. Pipeline and Gas Journal. Petroleum Engineer Publishing, 1970.
Precaución: Estas citas no son 100% exactas.